Service Guide

LTE Standard Module Series
EG915U_Series_Hardware_Design 25 / 90
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
PSM_IND
1
DO
Indicates the module’s
power saving mode.
PSM_EINT
96
DI
External interrupt pin.
Wakes up the module
from PSM.
Other Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
W_DISABLE#
18
DI
Airplane mode control
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power
domain.
Pulled up by
default. When it
is in low voltage
level, the module
can enter the
airplane mode.
If unused, keep it
open.
AP_READY
19
DI
Application processor
ready
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power
domain.
If unused, keep it
open.
GND
Pin Name
Pin No.
GND
3, 31, 48, 50, 54, 55, 58, 59, 61, 62, 67–74, 79–82, 89–91, 100–102
RESERVED
Pin Name
Pin No.
RESERVED
11–14, 16, 49, 51, 57, 65, 66, 78, 92–95, 97–99, 103–118, 123–125
1. The functions of PSM and GRFC are under development and it is currently not recommended to
use them. Please consult Quectel Technical Support for details.
2. When using pins 18, 19, 30, 38, and 39, please note that these pins will have a period of variable
level state (not controllable by software) after the module is powered on: first high level (3 V) for 2 s
and then low level (0 V) for 1.2 s, before they can be configured as 1.8 V input or output. Please
evaluate whether the unstable output state on power-up meets your application design
NOTE